Impact of resuspended sediment on zooplankton feeding in Lake Waihola, New Zealand

Summary 1. Wind‐induced sediment resuspension in shallow lakes affects many physical and biological processes, including food gathering by zooplankton. The effects of suspended sediment on clearance rate were determined for a dominant cladoceran, Daphnia carinata, and calanoid copepod, Boeckella ham...

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Veröffentlicht in:Freshwater biology 2005-09, Vol.50 (9), p.1515-1536
Hauptverfasser: LEVINE, SUZANNE N., ZEHRER, REGLINDIS F., BURNS, CAROLYN W.
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Sprache:eng
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Zusammenfassung:Summary 1. Wind‐induced sediment resuspension in shallow lakes affects many physical and biological processes, including food gathering by zooplankton. The effects of suspended sediment on clearance rate were determined for a dominant cladoceran, Daphnia carinata, and calanoid copepod, Boeckella hamata, in Lake Waihola, New Zealand. 2. Animals were incubated at multiple densities for 4 days in lake water containing different amounts of suspended lake sediment. Rates of harvest of major food organisms were determined for each sediment level (turbidity) from changes in net growth rate with grazer density. 3. Daphnia cleared all food organisms 7–40 μm in length at similar rates, but was less efficient in its removal of free bacteria, phytoplankton
ISSN:0046-5070
1365-2427
DOI:10.1111/j.1365-2427.2005.01420.x